Modula-3 is a new programming language evolved from Pascal and 
Modula-2. It supports interfaces, objects, generics, lightweight threads of 
control, isolation of unsafe code, garbage collection, exceptions, and 
subtyping, and is substantially simpler than other languages with 
comparable power. 

Modula-3 was designed by DEC and Olivetti with consultation from Niklaus 
Wirth, the designer of Pascal and Modula-2. The DEC Systems Research 
Center distributes a Modula-3 compiler and runtime system for DEC, IBM, 
HP, and Sun workstations. 

This book includes the language definition together with a collection of 
examples, ranging from a tutorial on an object-oriented window system 
toolkit to a tour of the low levels of an input-output stream package. These 
successful system designs illustrate Modula-3 as no toy examples could. If 
you are a programmer experienced in any language who would like to see 
solid examples of how interfaces, objects, garbage collection, and threads 
help to make programming safe and efficient at the same time, then this 
book is written for you.